Rev 6/19 EFII System32 Installation Instructions For Lycoming 4 and 6 cylinder engines (This manual can be found on the Downloads page at www.flyefii.com) Introduction This document is intended to serve as a guide for the installation of the EFII System32 Electronic Engine Management System for Aircraft engines. The System32 kit provides a fully redundant, aviation grade, electronic fuel injection and electronic ignition system for your aircraft. Installation of this system requires modification to the fuel system, electrical system, and engine components of the aircraft. The EFII System32 kit is a complete electronic engine management kit for aircraft engines. System32 includes semi-sequential electronic fuel injection and high energy electronic ignition for all spark plugs. The EFII system is similar to the type of engine management that you would find on any modern automobile. When properly installed and operated, the EFII system will improve engine reliability, efficiency and horsepower output as well as reduce pilot workload. Please refer to the System32 User Manual for details on how to use System32 after installation. Description The EFII system consists of dual System32 Electronic Control Units (ECUs), System32 Cockpit Controller, System32 Crank Trigger, System32 wire harness, sensors, coils, electronic fuel injectors, Iridium spark plugs, spark plug adapters, spark plug wires, fuel pumps, fuel filters, fuel pressure regulator, and all mechanical adapters required for the installation on your aircraft engine. The only significant components not included are airframe fuel lines and a duplex fuel valve (if required). The EFII system displaces a number of parts that would otherwise be used on the engine. Parts no longer used are the magnetos, aircraft spark plugs, mechanical fuel pump, carb or injector servo, and any mechanical injection components including the fuel spider and mechanical injectors. Flying with the EFII system is very easy. Once the system is tuned, the pilot no longer needs to worry about fuel mixture or any other aspect of the engine operation except where the throttle should be set. We recommend running a wide band oxygen sensor to give you a continuous readout of the air/fuel ratio present in your engine. This combined with one or more EGT readings gives you a very good idea of how your EFI system is operating. PLX Devices makes a nice wide band O2 sensor kit. You will not need a separate air/fuel ratio gauge. Your air/fuel ratio will be displayed on your System32 Controller. PLX can be found at: www.plxdevices.com (Part No. SM-AFR - Wideband Air/Fuel Sensor & Module ).
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Transcript
Rev 6/19
EFII System32 Installation Instructions
For Lycoming 4 and 6 cylinder engines (This manual can be found on the Downloads page at www.flyefii.com)
Introduction
This document is intended to serve as a guide for the installation of the EFII System32 Electronic Engine
Management System for Aircraft engines. The System32 kit provides a fully redundant, aviation grade,
electronic fuel injection and electronic ignition system for your aircraft.
Installation of this system requires modification to the fuel system, electrical system, and engine components of
the aircraft.
The EFII System32 kit is a complete electronic engine management kit for aircraft engines. System32 includes
semi-sequential electronic fuel injection and high energy electronic ignition for all spark plugs. The EFII
system is similar to the type of engine management that you would find on any modern automobile. When
properly installed and operated, the EFII system will improve engine reliability, efficiency and horsepower
output as well as reduce pilot workload.
Please refer to the System32 User Manual for details on how to use System32 after installation.
Description
The EFII system consists of dual System32 Electronic Control Units (ECUs), System32 Cockpit Controller,
Crank Trigger Your System32 EFII kit includes a billet aluminum, Hall effect crank trigger assembly as shown below:
The System32 crank trigger sensor contains two electrically independent sensors in one housing.
One sensor provides rpm and timing information to ECU1, the other sensor provides similar information to
ECU2.
The crank trigger mounts onto the front two 3/8” engine case bolts that are above and below the crankshaft.
Remove the nuts and washers from the right side of these two bolts. Locate the two one inch long threaded hex
standoffs in your crank trigger kit. Apply a drop of red Loctite onto the threads of each case bolt and screw the
standoffs onto the ends of the case bolts. Make sure the bolts go no more than ½” into the standoff when
assembled. If the bolts are too long, shorten them or add washers as necessary under the bolt head. DO NOT put
a washer between the threaded standoffs and the engine case – this will set the crank trigger at the wrong height.
Torque the standoffs to 300 in. lbs.
Locate the two stainless 3/8”-24 x 1 1/2” set screws included with the crank trigger. Ensure that there is approx
½” of available thread depth in the hex standoffs installed in the last step. Install the two set screws into the
ends of the threaded standoffs using red loctite and torque them to 200 in. lbs.
Position the crank trigger assembly onto the installed set screws and secure with the included all-metal lock nuts
and AN washers (never use Nylock nuts on the engine). Torque the lock nuts to 200 in. lbs.
Carefully test fit your flywheel onto the engine. Make note of the indexing (larger) prop dowel position on the
prop flange and the flywheel. The flywheel will only go on one way. With the flywheel properly clocked to the
crankshaft, carefully slide it onto the end of the crankshaft and watch for any interference with the crank trigger
assembly. With the flywheel fully seated, there should be an air gap between the flywheel and the crank trigger
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of approx .030” to .050”. A drill bit makes a good gauge to measure the airgap. If the airgap is too small,
material must be machined off the threaded hex standoffs to increase the airgap.
Once the crank trigger is installed, route the crank trigger cable over the center of the top of the engine. Support
the crank trigger cable using adel clamps attached to the top case bolts. (retorque ¼” case bolts to 75 in. lbs.)
Throttle Body Locate the throttle body assembly in your kit. There is a 1” thick Lycoming sump adapter plate included with
the throttle body. Separate the sump adapter from the throttle body. The sump adapter has two 1/8” NPT
pressure ports on one side. These are included as pick off points for manifold pressure lines. Manifold pressure
lines will connect to your EFII MAP sensors as well as to the fuel pressure regulator and engine monitor MAP
sensor. The sump adapter can be rotated in any direction to facilitate manifold line connections. Below is a
picture of a mounted sump adapter:
Attach the sump adapter to your engine sump using the included 5/16”-24 x 1 ¼” socket head screws. Use Ultra
Black Silicone Gasket Maker between the engine sump and the sump adapter. Use blue loctite on the 5/16”
allen head screws and torque to approx 180 in. lbs.
The throttle linkage will generally be located on the left side of the throttle body. The throttle body has a
universal linkage bracket that can be easily connected to your throttle linkage whether the throttle body is
mounted in a vertical or horizontal fashion. It is acceptable to cut off the unused arm of the linkage adapter plate
if desired. Apply Ultra Black Silicone Gasket Maker between the throttle body and sump adapter. Attach the
throttle body to the sump adapter using the supplied hex bolts, lock washers and nuts. Below are pictures
showing throttle linkage hookup for horizontally and vertically mounted throttle bodies:
Note – the throttle cable throw is 2.3” or 2.6” depending on which hole you use to mount the cable end.
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MAP Sensors Your System32 EFII kit includes two MAP (manifold absolute pressure) sensors.
These sensors monitor the air pressure inside the intake tract of the engine. The MAP sensors are connected to
the engine intake with two pressure lines that originate at the throttle body sump adapter plate. Each MAP
sensor should have its own separate pressure line for best system redundancy. Please refer to Drawing 7 for
details of the MAP pressure hose connections.
The MAP sensors are typically mounted on the upper area of the engine side of the firewall.
This provides for easy plumbing of the pressure hoses and easy inspection/maintenance of these devices.
System32 MAP Sensors are available in different pressure ranges. Normally aspirated engines will always use a
1 Bar (= 1 atmosphere = 0” to 30” pressure range) MAP sensor. Turbocharged or supercharged engines will use
a higher pressure range sensor if manifold pressures will go above 30”. The following MAP sensor ranges are
supported by System32 ECUs:
1 Bar MAP sensor – normally aspirated engines, 0” to 30” pressure range.
2 Bar MAP sensor – turbo engines, 0” to 60” pressure range.
3 Bar MAP sensor – turbo engines, 0” to 90” pressure range.
4 Bar MAP sensor – turbo engines, 0” to 120” pressure range.
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Ignition Coils and Magneto Block Plates Typically, the ignition coils are mounted to magneto block off plates which serve to cover up the magneto holes
in the accessory case. In some cases, it may be more convenient to mount the ignition coils to the firewall. EFII
can provide magneto block off plates that do not include the coil mounting features if this suits your installation.
Below is a picture of typical ignition coil mounting on the accessory case:
4 cylinder systems will typically be installed with the 2 coil packs mounted on the included magneto block
plates. It is important to make sure there is clearance between the motor mount and the coils. It is highly
recommended to hang the motor mount onto the engine when fitting the coils. In some cases, the impulse
coupling spacer that typically sits under the left mag (Lyc pn 61666) can be used to space one of the coils out
about .8” away from the motor to improve clearances. When mounting the coils with the magneto block off
plates, the left coil will mount with its connector pointing down and the right coil will mount with its connector
pointing up (as seen in the picture above). After you have test fitted the coils and motor mount, apply Ultra
Black Silicone Gasket Maker between the magneto block off plate and the accessory case and permanently
mount the coils.
6 cylinder systems utilize three coil packs which are mounted on a CNCed subplate for easy installation. RV-10
installations have room to mount the coil packs on top of the motor mount as in the image below. If you don’t
have room for the coil packs in this location, they can be firewall mounted.
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Spark Plugs and Adapters
Your kit comes complete with Iridium spark plugs and spark plug adapters for all plug locations.
CAUTION- Always install the brass spark plug adapters onto the spark plug first and then install the assembly
into the cylinder. Never torque the spark plug adapters into the cylinder without a spark plug installed – this
could damage the spark plug adapter. With spark plugs and adapters installed into the cylinders, torque the
spark plug only to 30 ft lbs. This will seat the washers on both the adapter and the spark plug with one step.
Your plugs should be factory gapped at .032” to .035”. If you adjust the gaps, be very careful not to damage the
thin center electrode (don’t pry against it). Install the adapters and plugs in all plug locations.
Spark Plug Wires It is best to wait on spark plug wire assembly until the motor is on the motor mount and all engine accessories
and baffling are mounted. This will ensure when you establish wire lengths and routing that everything fits well.
When you are ready to prepare the spark plug wires, follow the instructions that come with the included spark
plug wire set. A pair of spark plug wire crimpers are handy to have available. If you don’t have access to proper
crimpers, you can get them from summitracing.com pn TAY-43390. Below is a diagram showing which coil
outputs should be connected to which spark plug.
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Mechanical Fuel Pump Block Plate The EFII system does not use the original engine driven mechanical fuel pump. A block off plate is installed
over the accessory case opening where the mechanical fuel pump would be mounted. Locate the fuel pump
block plate assembly in your kit. Below is a picture of this assembly:
The pushrod inside the accessory case that originally actuated the stock mechanical fuel pump can be left in
place, or it can be left out of the engine assembly if your engine is being re-assembled. Leaving the fuel pump
push rod installed in the engine will not cause any issues.
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Clean the area of the accessory case where the fuel pump block plate will be located. Apply a smear of Loctite
Ultra Black gasket maker to the area of the accessory case that will contact the block plate. Affix the block plate
to the engine with the included 3/8” bolts and lock washers.
Engine Temperature Sensor The EFII system uses an engine temperature sensor to detect when the engine is cold or warming up. Extra fuel
is added during engine warmup to make the engine run smoothly while it is coming up to operating
temperature. The engine temp sensor is a two wire unit with a male 1/8NPT mounting thread at one end. Apply
some Teflon pipe dope to the NPT threads of the sensor and install it into the top (mechanical) injector port of
the right rear cylinder. The engine temperature at this position is similar to oil temperature and is a convenient
location for this sensor.
Electronic Fuel Injector Assemblies Your EFII kit includes 4 ( or 6 for six cylinder engines) of our ultra compact PMI Electronic Fuel Injector
assemblies. The PMI (Port Mount Injector) assemblies screw into the primer port holes on the sides of the
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cylinders. This provides for a clean, simple installation that keeps the injectors away from cylinder heat soak
and allows for a cold fuel rail connecting all injectors. This means that the injectors always have fresh, cold fuel
feeding each cylinder. Heat soak or vapor lock cannot occur with EFII systems. EFII PMI injector assemblies
include stainless steel base fittings and 7075 aluminum top fittings for maximum mechanical strength.
The high pressure portion of the fuel system consists of the fuel path that starts at the outlet of the fuel pumps,
goes to the rear injector on one side of the engine, continues to the adjacent injector on the same side of the
engine, crosses to the other side of the engine, under the front of the engine case to the forward injector on the
opposite side of the engine, continues to the adjacent injector rearward and then back to the firewall to the fuel
pressure regulator. 2 (or 4 for six cyl systems) precision length fuel lines are included in your kit along with 2
AN-6 male to female 90 fittings. The precision length lines should be installed between adjacent injectors on
each side of the engine. The 90 fittings should be installed on the forward side of the two front injectors. These
fittings provide a good entry point for the custom fuel line that will cross from one side of the engine to the
other.
Fuel lines. All engine area fuel lines should be fire sleeved AN -6 teflon lines. No lines should be stretched
tight between fittings. There should always be a small curve to each installed line to account for engine growth
and movement. All lines should be secured every six inches with Adel clamps or other suitable cushioned hose
mount hardware. Follow the additional injector installation instructions that are packaged with your PMI
injector assemblies.
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Wire Harness Your EFII kit includes a prewired Tefzel wire harness. The majority of connectors are pre-installed for easy
installation. The following two images show all of the harness connectors.
The image below shows the cabin side of the harness. Descriptions of the connectors follow.
Harness Connectors – Cabin Side
A. Firewall circular connector (ignition).
B. Firewall circular connector (fuel).
C. ECU2, +12v and ground wires.
D. ECU1, +12v and ground wires.
E. Ignition +12v (one power wire for each coil pack, one power wire for the injector power circuit).
F. Signal wire group:
Injector Enable Wires (2ea), orange.
P-Lead (ignition run-up function) (2ea), white.
Fuel Flow signal out, blue.
Tach signal out, green.
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The Image below shows the engine side wire harnesses. Descriptions of each connector follow.
Harness Connectors – Engine Side
Fuel Harness Connectors
1. Firewall circular connector (fuel).
2. Ring terminal ground - injector ground returns.
3. Engine temperature sensor (sensor in top 1/8” NPT port of right rear cylinder).
4. Throttle position sensor (on throttle body).
5 and 6. Intake air temperature sensors (on throttle body).
7. Injector wires (one red, one black for each injector).
Ignition Harness Connectors
8. Firewall circular connector (ignition).
9. Ring terminal ground – coil pack grounds.
10, 11, 12. Coil pack control. (2 connectors for 4 cyl, 3 connectors for 6 cyl).
13 and 14. MAP sensors.
15 and 16. Crank trigger sensors.
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+12V and Ground Wiring for the EFII Wire Harness
Please refer to DRAWING 9. Three circuit breakers are required to feed power to the EFII wire harness. Each
ECU requires a 5A breaker, and the Ignition power circuit requires a 15A breaker.
The EFII wire harness has additional circuit protection built into the harness. Each coil pack power wire and
each injector power wire has its own fusible link circuit protection inside the harness. The fusible links for the
coil pack power wires are located within the backshell of the engine side circular connector for the ignition
portion of the harness. The fusible links for the coil pack power wires are located within the backshell of the
engine side circular connector for the fuel portion of the harness. ECU ground wires should be connected to
your avionics ground bus. The ring terminal grounds near the engine side of the circular connectors should have
a low resistance ground path back to the battery. This is typically the firewall pass through ground bolt that also
connects to the engine ground cable.
Signal Wire Group on the Cabin Side of the Wire Harness
Injector enable wires – these are two orange wires, one from each ECU. These wires have a “ground to stop”
functionality. Grounding the injector enable wire shuts off the fuel injector drive from that ECU. One of these
wires will always be grounded, the other will have an open circuit per DRAWING 9.
P-Lead wires – these are two white wires, one from each ECU. These wires have a “ground to stop”
functionality. When a P-lead wire is grounded, the ignition outputs for that ECU will be turned off. These wires
are used to implement the ignition run-up function per DRAWING 9.
Fuel Flow signal out – blue wire. This wire provides a signal that mimics a Floscan 232 or Red Cube type fuel
flow sensor. You do not need a mechanical fuel flow sensor with System32. The fuel flow signal is derived
electronically. This signal wire should be connected directly to the fuel flow signal input of your engine
monitor. Use the K factor parameter in your engine monitor to calibrate the engine monitor fuel flow reading.
Higher K factor = lower reading and vice versa. If you decrease the K factor by 20%, you will get a 20% higher
fuel flow reading, etc.
Tach signal out – green wire. Connect this signal wire to the tach input (or rpm input) of your engine monitor or
tachometer. This is a 12 volt square wave signal with 2 pulses per rev for 4 cylinder systems, 3 pulses per rev
for 6 cylinder systems.
Circular Firewall Connectors
Your System32 wire harness includes pre-installed circular connectors to serve as a firewall pass-through and to
ease wire harness installation. EFII systems (ignition + fuel) have two circular connectors in the harness. One
circular connector contains all of the signals required to run the ignition portion of the system, the second
circular connector contains the additional signals required to add the fuel injection portion of the system. There
are colored dots on the connectors to show which engine side connector goes to which ECU side connector.
The ignition circular connectors have white dots on them. The fuel circular connectors have red dots on them.
You can see the dots when you separate the connectors.
The ECU side of the harness will mount to the cabin side of the firewall using the square flange that is part of
each ECU circular connector. Aircraft that have firewalls that are more than 1/8” thick (some composite
aircraft) will require that the circular connectors be mounted on a metal subplate that is then mounted to a hole
in the firewall.
+12V power distribution through the Ssytem32 wire harness includes fusible links on the power wire feeding
each coil pack as well as each fuel injector. The System32 wire harness design ensures that a short circuit at one
coil or injector does not affect the 12v power to the other coils or injectors. This provides the highest level of
safety and redundancy on the 12v power distribution of your EFII system. The fusible links are located within
the engine side backshells of the circular connectors. These are factory installed, factory serviced items. If you
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accidentally short out one of these fusible links, please call EFII for assistance. If an injector power fusible link
is blown while you are travelling, an acceptable field fix is to jumper power from the adjacent injector after the
shorting fault is corrected.
Fuel Injector connectors
EFII System32 fuel injection is a semi-sequential fuel delivery system that fires the fuel injectors in phase with
each cylinders intake valve operation. The fuel injector wires are grouped and numbered by cylinder number.
There is one black wire and one red wire for each injector. It is recommended to use -4 fire sleeve on the
injector wires for added heat protection. After you have routed the injector wires, trim the wires to length and
attach the injector connectors. The injectors are non polar, meaning that it doesn’t matter which terminal gets
the red wire and which gets the black wire, they will work either way.
To install the injector terminals, first push the wire through a rear rubber seal as shown below. Strip the wire
back approximately 3/16” and lay the wire and rubber seal into the terminal. Carefully close the small barrel of
the connector around the stripped portion of the wire with a pair of needle nose pliers and close the large barrel
of the connector around the rubber seal as shown below. Now carefully solder the portion of the terminal that is
crimped onto the stripped area of the wire. If soldering is not your best skill, this would be a good place to get
help from someone familiar with assembling wire components.
After soldering the terminals onto the wires, push them into the back of the connector housing until the
terminals click into position. The finished result should look something like below:
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ECUs and Cockpit Controller Outline drawings of the ECUs and Cockpit Controller can be found in DRAWINGS 4 and 5.
System32 EFII kits use dual state of the art 32 bit microprocessor ECUs to manage the fuel and ignition
requirements of your engine. System32 ECUs are designed specifically for the high demands of aircraft engine
operation. Reliability and redundancy were the chief design goals in the specification of the EFII System32
ECUs. The ECU fuel map and ignition timing can be modified by the end user to tailor the operation of your
EFII system to the specific requirements of your vehicle. The ECUs are typically mounted under the instrument
panel, not far from the firewall. It is best to mount the ECUs such that the connectors can easily be accessed for
the sake of attaching the wire harness. The ECUs should be mounted such that moisture cannot find its way into
the ECU enclosures – the enclosures are not waterproof.
Your kit also contains the EFII System32 Cockpit Controller. The System32 Controller utilizes a sunlight
readable full color LCD screen to display EFII system information. The Controller fits into a standard 3 1/8”
round instrument hole and gives you access to all the parameters of your EFII system. The Controller displays
four pages of engine information that give you direct access to the values coming from each of the sensors
attached to your EFII system. The EFII system can be flown without the Controller present, though most people
prefer to have it mounted in the instrument panel for easy access to EFI data and programming.
The Controller portion of your kit includes two cat5 serial cables (same as an Ethernet cable) for connection
between the Controller and the ECUs. Plug one end of each cat5 cable into the Controller first and then plug the
remaining end of the cable into the mating connector on each ECU. The Controller receives 12v power and
ground through the cat5 serial cables and requires no additional power wiring to operate.
Pressing the “Monitor” button on the Controller will rotate the display through the four engine data screens –
two screens for ECU1, two screens for ECU2.
The Controller provides system monitor information, access to fuel and ignition mapping, firmware update
capability, and a fuel trim knob all in one attractive package that matches up nicely to any modern glass panel
instrumentation. The Controller also has built-in annunciator functions that save panel space and add to the
available system information. The annunciator functions include ECU power, ignition run-up (p-lead) switch
position and ECU Select switch position, fuel pump power, voltage level indicators for two batteries, and an air
fuel ratio display.
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Controller Annunciator Functions Refer to DRAWING 8 for wiring connections required to use the Controller annunciator functions.
The System32 Cockpit Controller can support a number of annunciator functions that require connection of the
Controller wire harness included in your kit. This wire harness has a DB-15 female connector at one end with
five wires extending from the connector. The annunciator functions include:
Battery 1 voltage, blue wire, connect to Batt 1+12v or to pin 2 of Bus Manager control plug.
Battery 2 voltage, orange wire, connect to Batt 2 +12v or to pin 8 of Bus Manager control plug.
Fuel Pump 1 On/Off, red wire, connect to Fuel Pump 1 +12v power wire.
Fuel Pump 2 On/Off. white wire, connect to Fuel Pump 2 +12v power wire.
Air Fuel Ratio display, green wire, connect to 0-5v output from O2 sensor amplifier.
Please refer to the System32 User Manual for detailed information on using System32 after installation.
Explanation of the System32 Sensors There are five types of sensors associated with your EFII system as follows:
1. Crank Trigger – importance ESSENTIAL – The System32 Crank Trigger assembly contains two electrically
separate crank trigger sensors – one sensor for ECU1 and one sensor for ECU2. The Crank Trigger sensor
mounts to the font two bolts of your engine case that reside above and below the crankshaft centerline. This
sensor gives rpm and ignition timing information to the ECUs. We have installed three magnets (four magnets
for six cylinder engines) into the ID area of your flywheel, under the alternator belt pulley flanges. Four
cylinder engines have two timing magnets 180 degrees apart and one sync magnet. Six cylinder engines have
three timing magnets 120 degrees apart and one sync magnet. Each Crank Trigger is actually a dual element
sensor. One element senses the timing magnets and one element senses the sync magnet.
2. Manifold Absolute Pressure Sensor (MAP) – importance ESSENTIAL – System32 kits include two MAP
sensors – one for each ECU. The MAP sensors are three wire sensors that are typically mounted in an upper
location of the firewall to keep them away from exhaust heat.. The MAP sensor tells the ECU how much air
pressure is in the engine intake manifold. The combination of the MAP sensor and the rpm information from the
Crank Trigger are the most critical inputs to your ECU. So please mount and hook up both of these sensors
with care. A manifold pressure source must be routed to the MAP sensor. A pressure source directly from the
sump adapter plate is preferred since this will be a more steady pressure signal than from one of the cylinder
heads. Your system includes a vacuum hose kit which has heavy wall line and barb fittings to make the pressure
line connections to your MAP sensor and fuel pressure regulator. Tie wrap the vacuum line on at all fittings.
3. Intake Air Temp Sensor (IAT) – importance IMPORTANT – There are two IAT sensors mounted on the
throttle body, one for each ECU, The information from the IAT sensor allows the ECU to make an air density
correction to compensate for the temperature of the intake air. Though the IAT signal is important, the engine
will still run if this sensor has a problem. The IAT is a two wire sensor that is mounted on the side of the throttle
body. In the picture below, you can see the IAT sensor sitting at the top of the throttle body and the TPS sensor
on the side of the throttle body.
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4. Throttle Position Sensor (TPS) – importance LOW – The TPS sensor is a three wire sensor mounted on the
butterfly shaft of the throttle body. The throttle position sensor serves only to provide a simulated accelerator
pump function when the throttle is moved rapidly. Whenever the ECU senses a rapidly opening throttle
movement, it adds some additional fuel to keep the engine from stumbling during the ensuing engine
acceleration. The level of TPS fuel enrichment can be adjusted through the Controller to fine tune this function.
The TPS sensor also works when the engine is not running. In this case, it provides a primer squirt of fuel
before engine cranking to make cold starting easier. Both ECUs have visibility of the TPS sensor.
5. Engine Temp Sensor (ET) – importance LOW - The ET is a two wire sensor that is typically installed in the
upper 1/8NPT port of the right rear cylinder. The ET sensor lets the ECU know if the engine is cold or if it has
warmed to operating temp. When the engine temp is below 120 degrees F, the ET sensor input causes the ECU
to enrich the fuel delivery to help the engine run smoothly while it warms to operating temperature. Once the
engine is warm, this sensor no longer affects the fuel delivery. The ET sensor is only connected to ECU1. ECU2
does not provide the warm up enrichment function. (always start and warm the engine using ECU1 to take
advantage of warm up enrichment).
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EFII Pre Start System Checks All elements of your EFII system should be checked for proper operation before starting your engine. Below is
a checklist to aid in this process.
Fuel system
Double check fuel selector valve function and positions
Fuel pump function, primary and backup pump control
Check and set fuel pressure (35psi with one pump running, engine stopped)
Fix any leaks, check tightness of all fuel lines
ECU
Verify power and ground
Check and set ECU parameters
Verify function of sensors
Crank trigger
(check for T1, S1, T2, S2 indication on Controller as prop is turned by hand)
MAP (check MAP reading for each ECU on Controller – should read atmospheric
pressure for both ECUs when engine is not running)
IAT (should read close to ambient temperature for both ECUs)
TPS (should increase with application of throttle)
Engine temp (should be close to ambient temperature for ECU1, should read “---“
for ECU2)
Controller
Power up full system – Verify that Run-up switch 1 in STOP position causes ECU1 label to turn
red. Verify that Run-up switch 2 in STOP position causes ECU2 label to turn red. Move both P-
lead switches to Run position for the next steps.
Power up full system – then pull breaker for ECU2 - verify that ECU2 label on Controller is gray
(ECU not seen) and that ECU1 label on Controller is blue, green or red (not gray). Swap cat5
connectors at Controller if necessary.
Power up full system and set ECU Select switch to ECU1 – verify ECU1 label turns blue,
indicating ECU1 has fuel control. Move ECU Select switch to ECU2 – verify ECU2 label turns
blue, indicating ECU2 has fuel control.
Select Fuel Pump 2 and verify that Pump 2 label is yellow (pump 2 ON).
Select Fuel Pump 1 and verify that Pump 1 label is green (pump 1 ON).
Ignition
Verify injector power (red wire at each injector should have +12V when
ignition power is on)
Check injector plugs (make sure they are all fully plugged in)
Verify coil power (red wires at coil pacl control plug should have +12V when ignition
power is on)
Check spark plug wires are installed to correct cylinder numbers (***mis-wired spark
plug wires is the most common installation error***)
Verify spark plugs are tight
Throttle
Verify full travel of throttle body butterfly from fully closed to fully open with movement of throttle.
(Pre Start System Checks continued on next page)
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EFII Pre Start System Checks (cont.)
Batteries
Check battery voltages, charge or replace if necessary.
Starter
Check starter and starter solenoid wiring for proper operation
Running The Engine Before you start your engine, please review the System32 User Manual.
The System32 User Manual covers topics including:
System32 Configuration Parameters
Engine Starting Procedures
Use of the System32 Cockpit Controller
Air/Fuel Ratio, EGTs and CHTs
Engine tuning
The System32 User Manual can be found on the Downloads page at www.flyefii.com